There are certain cities in the world where you are likely to experience a long layover in your air travels. One of the most common of these is the London layover. I experienced a 19-hour stop there in early July.
Most of us don't want to do anything that will risk a missed flight. But if you have at least eight hours between your flights, do you really want to spend that time in a Heathrow or Gatwick terminal when there is so much to see and experience in Central London? Both airports have efficient train connections to the center of the city. Just be sure to allow plenty of time for delays and long security lines.
If you have a minimum of half a day to spend in London, you won't be making a comprehensive tour. But here is a step by step approach to making the most of your London layover.